#database_engine_java_wal_mvcc A database engine with common features of Btree, WAL, MVCC in Java language

##Implementation plan

1. architecture desgin, documentation, testcases
2. implement Btree, ServiceManager
3. implement WAL feature
4. implement MVCC feature (refactor code, Btree and Service Manager)
5. test and wrap up
6. implement in another language, cpp or go?